How Do I Keep Sugar Glass From Turning Yellow?

I have made a few attempts so create sugar glass. It yellowed each time. What am I doing wrong? Ugh! so frustrating! One tip I read said that my thermometer might be off. I am going to calibrate it and try again. Any other suggestions?!

You're definitely getting it too hot if it turns yellow. Are you putting the pan in a pan of cold water when it gets to the right temperature as you cook it? You need to do that to cool it down fast so that it stops heating up, or the residual heat will take it past the temp that you want it to be and it could start getting darker.